共查询到19条相似文献,搜索用时 125 毫秒
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通过对三价铬与六价铬电镀铬工艺的对比,分析了三价铬镀铬的工艺特征和镀液的特点,推广环保型三价铬镀铬具有重要意义。 相似文献
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镀铬工艺参数的准确检测对镀层性能非常关键,当前的检测系统对相关参数选择不准确,对工艺影响较大。提出一种新的镀铬工艺参数检测系统设计方法,通过实验分析了硫酸盐三价铬镀铬工艺材料和工艺参数特点,分析了p H、电镀时间和铬质量浓度对硫酸盐三价铬镀铬层的影响,确定这三种参数对硫酸盐三价铬镀铬层耐腐蚀性起到的作用。以此为基础设计一种智能化参数检测系统对硫酸盐三价铬镀铬工艺参数进行检测,主要包括主板模块、无线个域网(Zigbee)模块和传感器模块,详细介绍了各模块的硬件设计过程。实验结果表明,该系统不仅能耗低,实际效果较好。 相似文献
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三价铬镀铬工艺要求比六价铬镀铬严格许多?选用BH-88硫酸盐三价铬镀铬工艺。介绍了其镀液中三价铬、硼酸及辅助剂含量的分析方法,为维护该工艺的稳定提供了必要的条件。 相似文献
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简要概括了三价铬电镀在我国的发展情况,论述了三价铬电镀工艺的优缺点,介绍了硫酸盐体系三价铬电镀工艺在实际生产中的应用,重点阐述了镀液组成的维护,工艺条件的控制,以及杂质的影响与处理. 相似文献
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Hexavalent chromium solutions for decorative chromium plating in which perfluorooctane sulfonate (PFOS) was replaced by the fluorine‐free oleylamine ethoxylate were investigated. This substitute is degraded under the highly oxidative conditions of chromium plating processes and thus has to be replenished. In both an industrial plant and laboratory experiments the lead anode was found to undergo increased corrosion when oleylamine ethoxylate is used. This lead then precipitates as PbCrO4. The weight loss of the Pb anode was investigated for the use of PFOS and oleylamine ethoxylate as surfactants. It was shown in laboratory experiments that organic substances accumulate in chromium plating solutions with this alternative surfactant. By ion chromatography combined with mass spectrometric detection, dicarboxylates and amino dicarboxylates were identified. However, no negative impact on process safety and product quality could be determined when oleylamine ethoxylate was used. Monitoring of dissolved organic carbon is proposed as a means of assessing a chromium plating solution for organic contamination. 相似文献